论文标题
热木星黄蜂-104b的传输光谱中增强的斜率
An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b
论文作者
论文摘要
我们介绍了基于DBSP光谱仪的蓝色和红色通道在Palomar 200英寸望远镜上观察到的一个传输，并介绍了热木星黄蜂-104b的光传递光谱，并在1.52 M望远镜Carlos Carlos Sanchez上观察到了Palomar 200英寸望远镜的DBSP光谱仪和Muscat2四通道成像仪观察到的14个传输。在校正了伴侣恒星的通量污染后，我们还分析了45个K2的额外转移。加上DBSP和MUSCAT2获得的过境光曲线，我们能够修改系统参数和轨道象征，证实不存在过境时机变化。我们的DBSP和MUSCAT2组合的透射光谱揭示了比630 nm的波长的增强斜率，并表明在更长的波长下存在云甲板。尽管贝叶斯光谱检索分析有利于朦胧的气氛，但不能完全排除恒星斑点污染。从传输光谱和宿主恒星活动的详细表征中，需要进一步的证据来区分增强斜率的物理起源。
We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the DBSP spectrograph at the Palomar 200-inch telescope and 14 transits observed by the MuSCAT2 four-channel imager at the 1.52 m Telescopio Carlos Sanchez. We also analyse 45 additional K2 transits, after correcting for the flux contamination from a companion star. Together with the transit light curves acquired by DBSP and MuSCAT2, we are able to revise the system parameters and orbital ephemeris, confirming that no transit timing variations exist. Our DBSP and MuSCAT2 combined transmission spectrum reveals an enhanced slope at wavelengths shorter than 630 nm and suggests the presence of a cloud deck at longer wavelengths. While the Bayesian spectral retrieval analyses favour a hazy atmosphere, stellar spot contamination cannot be completely ruled out. Further evidence, from transmission spectroscopy and detailed characterisation of the host star's activity, is required to distinguish the physical origin of the enhanced slope.
